Which component of the cell membrane is primarily responsible for its selective permeability?
Glycoproteins
Peripheral proteins
Phospholipid bilayer
Cholesterol
Related Questions
According to widely accepted ‘fluid mosaic model’ cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statement is incorrect?
Proteins in cell membranes can travel within the lipid bilayer
Proteins can remain confined within certain domains of the membrane
Proteins can also undergo flip-flip movements in the lipid bilayer
Many proteins remain completely embedded within the lipid bilayer
A widely accepted, improved model of cell membrane is
Fluid mosaic model
Robertson’s model
Danielli and Davson’s mod
Unit membrane model
Which part of the phospholipid is hydrophobic?
Phosphate head
Glycerol backbone
Fatty acid tails
Entire molecule
Structural lipids of cell membrane are
Simple lipid
Chromolipids
Steroid
Phospholipids
The fluid mosaic model describes the cell membrane as:
A rigid, static layer
A solid barrier
A dynamic structure with embedded proteins
A single layer of phospholipids
The process by which a cell engulfs large particles or even other cells is called:
Pinocytosis
Exocytosis
Osmosis
Phagocytosis
According to Singer and Nicolson model of cell membrane
The quasi-fluid nature of lipid enables lateral movement of protein within over all bilayer
The quasi-fluid nature of protein enables lateral movement of lipid
Peripheral proteins are totally buried in the phospholipid bilayer
Tunnel proteins lie on the surface of cell membrane
Which of the following is the primary component of the cell membrane?
Carbohydrates
Proteins
Nucleic acids
Phospholipids
Fluid nature of plasma membrane helps in all, except
Cell growth and division
Formation of intercellular junctions
Endocytosis and exocytosis
Providing mechanical strength
During endocytosis, the cell
Divides its cytoplasm during mitosis
Digests itself
Engulfs and internalises materials using its membrane
Enables the extracellular digestion of large molecules
